Gaya APA
Scott, W. (2006).
Rob Roy Upper-Intermediate C1 Effective Operational Proficiency .
Amerika Serikat:
Mc Graw Hill.
Gaya MLA
Scott, Walter.
"Rob Roy Upper-Intermediate C1 Effective Operational Proficiency".
Amerika Serikat:
Mc Graw Hill,
2006.
Text.